Larry Costello
1954–55 to 1967–68 · 12 seasons
NBA player comparison
Larry Costello vs. Mo Williams: Career comparison
Regular-season verdict
Larry Costello ranks higher in career impact
Mo Williams
2003–04 to 2015–16 · 13 seasons
Impact comparison
Box impact estimates points per 100 possessions above each season's league average. Higher is better. Career ranks and average league finishes work the other way: lower is better.
#194LeadsCareer Impact RankPeak-weighted regular-season rank#986
+0.9Peak box impactEra-adjusted points per 100 possessions above league average · higher is better+1.5Leads
+0.4Best 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better+0.8Leads
22.0LeadsBest 3 average finishAverage league place · lower is better74.3
+973 ptsLeadsPoints above replacementCumulative regular-season value+751 pts
36.1LeadsBest 10 average finishAverage league place · lower is better139.3
Career Impact Rank places Larry Costello #194 and Mo Williams #986. It combines league finishes across each player's best three, five, and ten regular seasons, giving the most weight to the best three. Mo Williams had the higher single-season impact estimate.
Regular season only. Impact figures are estimates; small gaps are not exact. Playoffs, awards and titles do not determine the verdict.
Career Impact RankSee exactly how both rankings are calculatedLarry Costello25.540 · No. 194Mo Williams92.927 · No. 986
Only the three league-finish windows below determine Career Impact Rank. Career Value and peak impact are separate measures; neither adds points to this calculation. Lower composite scores rank higher.
Larry Costello
25.540 composite · No. 194 all-time
| Window and finishes used | Average finish | Weight | Contribution |
|---|---|---|---|
| Best 3No. 201957–58Reconstructed historical estimateIncludes bounded historical defense estimateNo. 201959–60Reconstructed historical estimateIncludes bounded historical defense estimateNo. 261960–61Reconstructed historical estimateIncludes bounded historical defense estimate | 22.000 | 50% | 11.000 |
| Best 5No. 201957–58Reconstructed historical estimateIncludes bounded historical defense estimateNo. 201959–60Reconstructed historical estimateIncludes bounded historical defense estimateNo. 261960–61Reconstructed historical estimateIncludes bounded historical defense estimateNo. 271958–59Reconstructed historical estimateIncludes bounded historical defense estimateNo. 291956–57Reconstructed historical estimateIncludes bounded historical defense estimate | 24.400 | 30% | 7.320 |
| Best 10No. 201957–58Reconstructed historical estimateIncludes bounded historical defense estimateNo. 201959–60Reconstructed historical estimateIncludes bounded historical defense estimateNo. 261960–61Reconstructed historical estimateIncludes bounded historical defense estimateNo. 271958–59Reconstructed historical estimateIncludes bounded historical defense estimateNo. 291956–57Reconstructed historical estimateIncludes bounded historical defense estimateNo. 331961–62Reconstructed historical estimateIncludes bounded historical defense estimateNo. 431963–64Reconstructed historical estimateIncludes bounded historical defense estimateNo. 501964–65Reconstructed historical estimateIncludes bounded historical defense estimateNo. 511962–63Reconstructed historical estimateIncludes bounded historical defense estimateNo. 621954–55Reconstructed historical estimateIncludes bounded historical defense estimate | 36.100 | 20% | 7.220 |
11.000 + 7.320 + 7.220= 25.540
Mo Williams
92.927 composite · No. 986 all-time
| Window and finishes used | Average finish | Weight | Contribution |
|---|---|---|---|
| Best 3No. 582008–09Recorded box inputsIncludes bounded historical defense estimateNo. 772009–10Recorded box inputsIncludes bounded historical defense estimateNo. 882007–08Recorded box inputsIncludes bounded historical defense estimate | 74.333 | 50% | 37.167 |
| Best 5No. 582008–09Recorded box inputsIncludes bounded historical defense estimateNo. 772009–10Recorded box inputsIncludes bounded historical defense estimateNo. 882007–08Recorded box inputsIncludes bounded historical defense estimateNo. 1152005–06Recorded box inputsIncludes bounded historical defense estimateNo. 1272014–15Recorded box inputsIncludes bounded historical defense estimate | 93.000 | 30% | 27.900 |
| Best 10No. 582008–09Recorded box inputsIncludes bounded historical defense estimateNo. 772009–10Recorded box inputsIncludes bounded historical defense estimateNo. 882007–08Recorded box inputsIncludes bounded historical defense estimateNo. 1152005–06Recorded box inputsIncludes bounded historical defense estimateNo. 1272014–15Recorded box inputsIncludes bounded historical defense estimateNo. 1312006–07Recorded box inputsIncludes bounded historical defense estimateNo. 1552011–12Recorded box inputsIncludes bounded historical defense estimateNo. 2082010–11Recorded box inputsIncludes bounded historical defense estimateNo. 2112012–13Recorded box inputsIncludes bounded historical defense estimateNo. 2232004–05Recorded box inputsIncludes bounded historical defense estimate | 139.300 | 20% | 27.860 |
37.167 + 27.900 + 27.860= 92.927
Averages, contributions, and totals are displayed to three decimal places. The ranking calculation keeps full source precision. Read the full method →
Full comparison · Career comparison
Understand the numbers
Start with impact, then compare playing time and skills. Team results add context. These are not categories to tally into a winner.
1 · Ranking evidence
Impact: who ranks higher, and why?
Career Impact Rank compares entire regular-season careers across NBA history. It combines average league places across the best three, five, and ten seasons, weighted 50%, 30%, and 20%. A lower rank or average place is better.
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Career Impact RankPeak-weighted regular-season rank | #194Better result for this metric. | #986 |
| Best 3 average finishAverage league place · lower is better | 22.0Better result for this metric. | 74.3 |
| Best 5 average finishAverage league place · lower is better | 24.4Better result for this metric. | 93.0 |
| Best 10 average finishAverage league place · lower is better | 36.1Better result for this metric. | 139.3 |
Show more stats: Impact
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Points-above-replacement rankAll-time rank in estimated regular-season points above replacement | #466Better result for this metric. | #589 |
| Peak box impactEra-adjusted points per 100 possessions above league average · higher is better | +0.9 | +1.5Better result for this metric. |
| Best 3 average box impactEra-adjusted points per 100 possessions above league average · higher is better | +0.7 | +1.2Better result for this metric. |
| Best 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better | +0.4 | +0.8Better result for this metric. |
| Best 10 average box impactEra-adjusted points per 100 possessions above league average · higher is better | -0.3 | +0.0Better result for this metric. |
| Points above replacementRegular season · fixed -2.0 replacement baseline · higher is better | +973 ptsBetter result for this metric. | +751 pts |
| Seasons ranked No. 1 | 0 | 0 |
| Top-five impact seasons | 0 | 0 |
| Top-ten impact seasons | 0 | 0 |
2 · Playing time and responsibility
How much did each player take on?
Read games and minutes alongside impact. Offensive usage is the share of team plays a player ends with a shot, free throws, or a turnover while on court. More usage is not automatically better.
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Games | 706 | 818 |
| Minutes | 21,198 | 23,872 |
3 · Individual skills
Where does each player have an advantage?
These are each player's averages across up to ten best seasons. Career Impact Rank gives the Best 3, Best 5, and Best 10 average league finishes 50%, 30%, and 20% window weights, giving the most weight to the highest peak. The model accounts for position, role, pace, playing time, and team results. Green marks the better result for a metric, including lower turnover rates. Workload and shot-selection measures stay neutral. These rows are not votes toward the ranking.
Shooting
True shooting includes two-pointers, three-pointers, and free throws.
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| True shooting percentage | 51.7% | 53.2%Better result for this metric. |
| True shootingAverage across the best impact seasons selected for the model input profile | 53.3% | 53.4%Better result for this metric. |
Show more stats: Shooting
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Field-goal percentage | 43.8%Better result for this metric. | 43.4% |
| Three-point percentage | Unavailable | 37.8% |
| Free-throw percentage | 84.1% | 87.1%Better result for this metric. |
Passing
Assist rate is the share of teammates’ made shots assisted while the player is on court. Read turnovers alongside offensive workload; lower turnover rate is generally better.
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Assist rateAverage across the best impact seasons selected for the model input profile | 17.6% | 29.1%Better result for this metric. |
| Assists per game | 4.6 | 4.9Better result for this metric. |
Show more stats: Passing
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Turnover rateAverage across the best impact seasons selected for the model input profile | Unavailable | 15.4% |
Rebounding
Rebound rate is the share of available rebounds collected while on court.
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Rebound rateAverage across the best impact seasons selected for the model input profile | Unavailable | 5.5% |
| Rebounds per game | 3.8Better result for this metric. | 2.8 |
Defense
Steals and blocks describe only part of defense. They do not capture every stop, rotation, or matchup.
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Steal rateAverage across the best impact seasons selected for the model input profile | Unavailable | 1.6% |
Show more stats: Defense
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Block rateAverage across the best impact seasons selected for the model input profile | Unavailable | 0.4% |
Scoring
Points per game describe scoring volume, not overall impact.
| Metric | Larry Costello | Mo Williams |
|---|---|---|
| Points per game | 12.2 | 13.2Better result for this metric. |
4 · Team context, not ranking inputs
What happened with and without them?
A verified with/without comparison is unavailable for this scope. We do not substitute another season’s observations.
Four separate questions
Impact, winning, playoffs, and awards
These are different ways to understand a career. Only Regular Season Impact determines the hussEyquation verdict. The other three sections add basketball context without adding points or changing the rank.
Regular Season Impact
Larry Costello ranks higher in career impact.
Larry CostelloMetricMo Williams
#194LeadsCareer Impact RankPeak-weighted regular-season rank#986
+0.9Peak box impactEra-adjusted points per 100 possessions above league average · higher is better+1.5Leads
+0.4Best 5 average box impactEra-adjusted points per 100 possessions above league average · higher is better+0.8Leads
+973 ptsLeadsPoints above replacementRegular season · fixed -2.0 replacement baseline · higher is better+751 pts
This is the ranking result. It uses regular-season impact only. Team records, playoffs, and awards do not change it.
Team Success
The advantages are split across the available measures.
Larry CostelloMetricMo Williams
595LeadsListed-team regular-season wins587
1.0%Listed-team winning percentage48.4%Leads
350-win team seasons4Leads
3Leads60-win team seasons2
11LeadsPlayoff team seasons6
Context only. Not included in Career Impact Rank. Final records for every listed team-season. A traded season can include more than one team.
Playoff Résumé
The advantages are split across the available measures.
Larry CostelloMetricMo Williams
10LeadsPlayoff appearances6
52Playoff games62Leads
34Team playoff wins42Leads
1Finals appearances1
1Championships1
Context only. Not included in Career Impact Rank. Team playoff results count only seasons when the player appeared in a playoff game.
Awards
Larry Costello leads every available measure below.
Larry CostelloMetricMo Williams
6LeadsAll-Star1
0MVP0
1LeadsAll-NBA0
0All-Defense0
0DPOY0
0Rookie of the Year0
Context only. Not included in Career Impact Rank. Major regular-season honors are recognition, not inputs to the impact ranking.
How each context field is counted
- Listed-team regular-season wins
- The sum of each listed team's final wins in every season the player represented that team.
- Listed-team winning percentage
- Those team wins divided by those teams' total regular-season games.
- 50- and 60-win team seasons
- Listed team-seasons that finished with at least 50 or 60 wins. Shortened seasons are not projected to 82 games.
- Team seasons reaching playoffs
- Listed team-seasons in which that team qualified for the playoffs.
- Playoff appearances and games
- Postseasons and games in which the player appeared.
- Team playoff wins
- Team wins from those postseasons. They describe team results, not individual credit.
- Finals appearances and championships
- Seasons when the player appeared in the playoffs for the finalist or champion.
- Awards
- Recorded NBA selections and major regular-season honors. A zero means the source records none; Not available means the source field is missing.
Source and scope Basketball Reference, NBA seasons 1950–51 through 2025–26, accessed 2026-10-09.
Career Shape Explorer
How the careers developed
Follow every regular season by NBA experience or age. This view describes the path; it does not create another verdict.
Larry CostelloMo WilliamsPeak seasonHistorical source qualification
Estimated points per 100 possessions above that season's league average
Striped bars mark seasons with fewer than 40 games. A dashed mark means that player had no season at the aligned point.
Season-by-season evidenceRead both careers at the same stage
Every observed season keeps its age, era-centered impact estimate, league rank when qualified, career-stage label, and exact evidence link. A missing career point stays missing.
Larry CostelloNBA seasonMo Williams
Season 1
Season 2
Season 3
Season 4
Season 5
Season 6
Season 7
Season 8
Season 9
Season 10
Season 11
Season 12
Observed values come from the accepted season comparison record. Historical source qualifications stay attached to affected seasons. Missing means no NBA season exists at that aligned point; it is never interpolated. Missing is not the same as estimated.